Physics - January 2007

2007-01-09 14:33:58 · 5 answers · asked by ^_^ 1

A person with mass of 25 kg on a trampoline jumps up and lands. If the person's height was 3 meters and after landing on the trampoline he continues down for another 1 meter before coming to a stop. What was the force exerted by the trampoline on the person?

2007-01-09 14:20:07 · 2 answers · asked by Anonymous

Four point masses of 3.0 kg each are arranged in square on massless rods. The length of a side of the square is 0.50 m. what is the rotational inertia about an axis.
a) passing through masses B and C?
A______B
| the sides are 0.50m
D______C
b) Passing through masses A and C? Diaganal
A_____B
| |
D_____C
c) passing through the center of the square and perpendicular to the plane of the square?
A------B
| . |
| | side is .50m
D------C there is a spot in the middle of the square

Show me how you find the answere step by step
I have a lot of problems like this one so I need to know how you find the answer thanks

2007-01-09 14:18:56 · 1 answers · asked by collegegirl 2

2007-01-09 14:10:25 · 4 answers · asked by ^_^ 1

We're gonna do a project on elastic/inelastic collisions and we have to be able to demonstrate each type of collision IN A CREATIVE WAY. Here some things i was thinking:

for inelastic:
shooting an arrow at a target
shooting a dart at a target (if arrows are too expensive or whatever)
Using a toy gun to shoot a foam dart (Nerf gun)

Elastic Collisions:
Take two remote controlled cars and run them into each other with some action figures strapped on top just for fun.

Ok please give me some more ideas and be as creative as you can. thanks in advance

Additional Details

10 minutes ago
why wouldn't my car idea work for elastic ?

Isn't an elastic collision when something hits something and it goes back with the same kinetic energy? like a tennis ball hitting a tennis racket.

2007-01-09 14:08:35 · 2 answers · asked by strawberrylollipop12345 1

2007-01-09 13:48:48 · 8 answers · asked by Joe 1

1. the speed of a satellite orbiting earth depends only on the mass of earth and (the mass of the satellite)

2. the equations of motion are (different) for objects in orbit around earth and for planets orbiting the sun

3. orbital speed and period are (independent) of the mass of the satellite

4. if the radius of earth were changed but the mass remained the same, acceleration due to (gravity would not change)

5. as you move further away from earth's center, acceleration due to gravity changes according to (a direct) relationship

2007-01-09 13:45:19 · 3 answers · asked by answerseeker 2

We're gonna do a project on elastic/inelastic collisions and we have to be able to demonstrate each type of collision IN A CREATIVE WAY. Here some things i was thinking:

for inelastic:
shooting an arrow at a target
shooting a dart at a target (if arrows are too expensive or whatever)
Using a toy gun to shoot a foam dart (Nerf gun)

Elastic Collisions:
Take two remote controlled cars and run them into each other with some action figures strapped on top just for fun.

Ok please give me some more ideas and be as creative as you can. thanks in advance

2007-01-09 13:39:08 · 3 answers · asked by strawberrylollipop12345 1

Explain how momentum might be used to determine the point where an aircraft exploded or a collision between aircraft occurred.

Please help me with this question.
I'm having trouble understanding it.

2007-01-09 13:36:21 · 1 answers · asked by swimmertommy 1

Maybe it depends on the size of the opening.

2007-01-09 13:34:56 · 2 answers · asked by amateur_mathemagician 2

plate tectonics in india move 15 cm/year. formations occurred during the last 1.00 x 10 to the 7th power. then india's formation slowed to about 5 cm/year. what is the acceleration in cm/year squared during this time period?

2007-01-09 13:31:02 · 1 answers · asked by Navy SEAL - 42 2

i need info or good websites for a project im doing on a egg drop but i dont need the experiment itself just research

2007-01-09 13:05:47 · 1 answers · asked by Anonymous

2007-01-09 13:05:15 · 3 answers · asked by Berlin Jean 1

How about a quarter or half dollar?

2007-01-09 13:02:22 · 11 answers · asked by rusty 2

I am not sure how a current transformers works. Can any one (very specifically) tell me how to make a currrent transformers? it's for my science class.

2007-01-09 12:58:29 · 1 answers · asked by Dominator. 2

What happens when a jet plane like concorde flies faster than the speed of sound?

2007-01-09 12:38:54 · 8 answers · asked by Muhammad A 1

The released hydrogen would rise to the top of the atmosphere and be blown away from the Earth by the solar wind.

2007-01-09 12:14:59 · 6 answers · asked by Anonymous

2007-01-09 12:12:23 · 11 answers · asked by Anonymous

2007-01-09 11:32:41 · 4 answers · asked by Bob D 1

2007-01-09 11:29:44 · 6 answers · asked by slim shady 1

Hi,

Consider the four charges in the diagram below, in which d = 4.8 cm and q2 = +2 nC. The net force on the 1 nC charge is zero. What is q1?

Here's the figure: http://i137.photobucket.com/albums/q208/infinitbelt/p25-49.gif


I am confused that the net force is 0. Does that make the charge 0?


Thanks!

2007-01-09 11:27:34 · 2 answers · asked by Anonymous

1. A potential difference of 1.5 volts occurs in most batteries. If the current produced is 12 amps. What is the resistance?
2. A potential difference of 12 V resulted when a charge of 600 ohms was placed on a terminal. What is the resistance?
3. What is the resistance of a light bulb if 2.4 A runs through it when 12 V is placed across the bulb?
4. What is the potential difference of a water heater element with a resistance of 32 ohms when the current is 6.8 A?
5. If 42 Amps places 7 ohms resistance on a terminal in a battery. What is the potential difference?
7: Voltage Current Resistance
20 V 4 A
120 V 15 OHMS
0.5 A 16 OHMS
10 V 400 MA
0.3 A 20 OHMS

2007-01-09 11:10:52 · 5 answers · asked by Anonymous

2007-01-09 11:06:19 · 9 answers · asked by Anonymous

2007-01-09 11:01:14 · 8 answers · asked by Kenneth F 1

2007-01-09 10:45:22 · 3 answers · asked by water yu 3

2007-01-09 10:43:39 · 2 answers · asked by water yu 3

give me as much info as you can on Issac Newton as you can.

2007-01-09 10:40:28 · 3 answers · asked by SPFN9 2

2007-01-09 10:39:44 · 3 answers · asked by bubbless221 2

the efficiency of a lift is 72.5%. what is the work needed to raise a 2.00*10^2 kg mass 5.65 m?

2007-01-09 10:38:32 · 3 answers · asked by lincolngomes301 2

a lawnroller is rolled across a lawn by a force of 115 N along the direction of the handle. the handle makes an angle of 22.5*(that star means degree, i couldn't find any degree sign on my keyboard) with respect to the horizontal. if the person exerts 64.6 watts of power for 90.0 seconds, what is the distance the lawnroller travels?

2007-01-09 10:35:18 · 1 answers · asked by lincolngomes301 2